Chapter 34

Which is more soluble in water? (a) AgI (b) \(\mathrm{AgF}\) (c) \(\mathrm{AgBr}\) (d) \(\mathrm{AgCl}\)

On passing \(\mathrm{H}_{2} \mathrm{~S}\) gas in group II sometimes the solution turns milky. It indicates the presence of (a) acidic salt (b) thiosulphate (c) oxidizing agent (d) reducing agent

Which compound does not dissolve in hot dilute \(\mathrm{HNO}_{3} ?\) (a) \(\mathrm{PbS}\) (b) \(\mathrm{HgS}\) (c) \(\mathrm{CuS}\) (d) \(\mathrm{CdS}\)

A metal is burnt in air and the ash on moistening smells of ammonia. The metal is (a) \(\mathrm{Mg}\) (b) \(\mathrm{Al}\) (c) \(\mathrm{Fe}\) (d) \(\mathrm{Na}\)

In qualitative analysis \(\mathrm{NH}_{4} \mathrm{Cl}\) is added before \(\mathrm{NH}_{4} \mathrm{OH}\) (a) to increase \(\left[\mathrm{OH}^{-}\right]\)conc (b) for making \(\mathrm{HCl}\) (c) to decrease \(\left[\mathrm{OH}^{-}\right]\)conc (d) statement is wrong

\(\mathrm{CrO}_{3}\) dissolves in aqueous \(\mathrm{NaOH}\) to give (a) \(\mathrm{Cr}(\mathrm{OH})_{3}\) (b) \(\mathrm{Cr}(\mathrm{OH})_{2}\) (c) \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) (d) \(\mathrm{CrO}_{4}^{2-}\)

Which of the following is not efflorescent? (a) \(\mathrm{NaOH}\) (b) hydrated \(\mathrm{CuSO}_{4}\) (c) hydrated \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) (d) all of these

\(\mathrm{K}_{2}\left[\mathrm{HgI}_{4}\right]\) detects the ion (a) \(\mathrm{Cl}^{-}\) (b) \(\mathrm{NO}\) (c) \(\mathrm{NH}_{2}\) (d) \(\mathrm{NH}_{4}^{+}\)

Which of the following cannot give iodomertic titration? (a) \(\mathrm{Cu}^{2+}\) (b) \(\mathrm{Fe}^{3+}\) (c) \(\mathrm{Ag}^{+}\) (d) \(\mathrm{Pb}^{2+}\)

Which one of the following does not produce metallic sulphide with \(\mathrm{H}_{2} \mathrm{~S}\) ? (a) \(\mathrm{COCl}_{2}\) (b) \(\mathrm{CuCl}_{2}\) (c) \(\mathrm{ZnCl}_{2}\) (d) \(\mathrm{CdCl}_{2}\)

Which of the following does not react with AgCl? (a) \(\mathrm{NH}_{4} \mathrm{OH}\) (b) \(\mathrm{NaNO}_{3}\) (c) \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) (d) \(\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}\)

Which metal salt gives a violet coloured bead in the borax bead test? (a) \(\mathrm{Co}^{2+}\) (b) \(\mathrm{Mn}^{2+}\) (c) \(\mathrm{Ni}^{2+}\) (d) \(\mathrm{Fe}^{2+}\)

Which of the following gives a precipitate with \(\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\) but not with \(\mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2} ?\) (a) sodium acetate (b) sodium nitrate (c) sodium chloride (d) sodium hydrogen phosphate

Which of the following is soluble in yellow ammonium sulphide? (a) \(\mathrm{SnS}\) (b) PbS (c) \(\mathrm{CuS}\) (d) \(\mathrm{CdS}\)

A white salt is readily soluble in water and gives a colourless solution with a \(\mathrm{pH}\) of about \(9 .\) The salt could be (a) \(\mathrm{CaCO}_{3}\) (b) \(\mathrm{CH}_{3} \mathrm{COONa}\) (c) \(\mathrm{NH}_{4} \mathrm{NO}_{3}\) (d) \(\mathrm{CH}_{3} \mathrm{COONH}_{4}\)

Action of caustic soda on \(\mathrm{Al}(\mathrm{OH})_{3}\) gives a compound having formula (a) \(\mathrm{Al}_{2}(\mathrm{OH})_{4}\) (b) \(\mathrm{Na}_{3} \mathrm{AlO}_{3}\) (c) \(\mathrm{Na}_{2} \mathrm{Al}(\mathrm{OH})_{4}\) (d) \(\mathrm{NaAlO}_{2}\)

A one litre flask is full of brown bromine vapours. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some (a) carbon disulphide (b) piece of marble (c) carbon tetrachloride (d) animal charcoal powder

Which one of the following ionic species will impart colour to an aqueous solution? (a) \(\mathrm{Cr}^{3+}\) (b) \(\mathrm{Cu}^{+}\) (c) \(\mathrm{Ti}^{4+}\) (d) \(\mathrm{Zn}^{2+}\)

A chloride dissolves appreciably in cold water. When placed on platinum wire in Bunsen flame no distinctive colour in noticed, the cation would be (a) \(\mathrm{Ba}^{2+}\) (b) \(\mathrm{Ca}^{2+}\) (c) \(\mathrm{Mg}^{2+}\) (d) \(\mathrm{Pb}^{2+}\)

By passing \(\mathrm{H}_{2} \mathrm{~S}\) gas in acidified \(\mathrm{KMnO}_{4}\) we get (a) \(\mathrm{S}\) (b) \(\mathrm{MnO}_{2}\) (c) \(\mathrm{K}_{2} \mathrm{SO}_{3}\) (d) \(\mathrm{K}_{2} \mathrm{~S}\)

Which is not dissolve by dil \(\mathrm{HCl}\) ? (a) \(\mathrm{MnS}\) (b) \(\mathrm{ZnS}\) (c) \(\mathrm{BaSO}_{4}\) (d) \(\mathrm{BaSO}_{3}\)

\(\mathrm{H}_{2} \mathrm{~S}\) in the presence of HCl precipitates II group but not IV group because (a) HCl increases concentration of \(\mathrm{Cl}^{-}\) (b) HCl lowers the solubility of \(\mathrm{H}_{2} \mathrm{~S}\) in solution (c) HCl activates \(\mathrm{H}_{2} \mathrm{~S}\) (d) \(\mathrm{HCl}\) decrease concentration of \(\mathrm{S}^{2-}\)

\(\mathrm{Mg}\) is not precipitated in \(\mathrm{V}\) group because (a) \(\mathrm{MgCO}_{3}\) is soluble in \(\mathrm{NH}_{4} \mathrm{Cl}\) (b) \(\mathrm{MgCO}_{3}\) is soluble in \(\mathrm{NH}_{4} \mathrm{OH}\) (c) \(\mathrm{MgCO}_{3}\) is soluble in water (d) none

Potassium cyanide is used for separating (a) \(\mathrm{Cu}^{2+}\) and \(\mathrm{Cd}^{2+}\) (b) \(\mathrm{Co}^{2+}\) and \(\mathrm{Ni}^{2+}\) (c) both (d) none of these

A metal chloride solution on mixing with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) solution gives a yellow precipitate, insoluble in acetic acid. The metal may be (a) zinc (b) lead (c) silver (d) mercury

Brown ring is made for (a) \(\mathrm{I}^{-}\) (b) \(\mathrm{Cl}^{-}\) (c) \(\mathrm{NO}_{3}^{-}\) (d) \(\mathrm{Br}^{-}\)

Which of the following leaves no residue on heating? (a) \(\mathrm{NH}_{4} \mathrm{NO}_{3}\) (b) \(\mathrm{NaNO}_{3}\) (c) \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}\) (d) \(\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\)

When \(\mathrm{I}_{2}\) is passed through \(\mathrm{KCl}, \mathrm{KF}, \mathrm{KBr}\) (a) \(\mathrm{Cl}_{2}\) is evolved (b) \(\mathrm{Cl}_{2}\) and \(\mathrm{Br}_{2}\) are evolved (c) \(\mathrm{Cl}_{2}, \mathrm{~F}_{2}\) and \(\mathrm{Br}_{2}\) are evolved (d) none of these

Which of the following sulphate is insoluble in water? (a) \(\mathrm{CdSO}_{4}\) (b) \(\mathrm{PbSO}_{4}\) (c) \(\mathrm{CuSO}_{4}\) (d) \(\mathrm{Bi}_{2}\left(\mathrm{SO}_{4}\right)_{3}\)

Which of the following is not precipitated as sulphide by passing \(\mathrm{H}_{2} \mathrm{~S}\) in presence of conc. \(\mathrm{HCl}\) (a) arsenic (b) lead (c) copper (d) cadmium

Which of the following gives blood red colour with KCNS? (a) \(\mathrm{Al}^{3+}\) (b) \(\mathrm{Cu}^{2+}\) (c) \(\mathrm{Fe}^{3+}\) (d) \(\mathrm{Zn}^{2+}\)

In the borax bead test of \(\mathrm{Co}^{2+}\), the blue colour of bead is due to the formation of (a) \(\mathrm{CoO}\) (b) \(\mathrm{Co}_{3} \mathrm{O}_{4}\) (c) \(\mathrm{B}_{2} \mathrm{O}_{3}\) (d) \(\mathrm{Co}\left(\mathrm{BO}_{2}\right)_{2}\)

\(\mathrm{AgCl}\) is soluble in \(\mathrm{NH}_{4} \mathrm{OH}\) solution. The solubility is due to the formation of (a) \(\mathrm{Ag}_{2} \mathrm{O}\) (b) \(\left[\mathrm{Ag}\left(\mathrm{NH}_{3}\right)_{2}\right]^{+}\) (c) \(\mathrm{AgOH}\) (d) \(\mathrm{NH}_{4} \mathrm{Cl}\)

Mercurous ion is represented as (a) \(\mathrm{Hg}^{2+}\) (b) \(\mathrm{Hg}_{2}^{+}\) (c) \(\mathrm{Hg}_{2}{\underline{\phantom{xx}}}^{2+}\) (d) \(\mathrm{Hg}+\mathrm{Hg}^{2+}\)

The metal ion which is precipitated when \(\mathrm{H}_{2} \mathrm{~S}\) is passed with HCl (a) \(\mathrm{Cd}^{2+}\) (b) \(\mathrm{Mn}^{2+}\) (c) \(\mathrm{Ni}^{2+}\) (d) \(\mathrm{Zn}^{2+}\)

The gas that turns lime water milky is (a) \(\mathrm{SO}_{2}\) (b) \(\mathrm{CO}_{2}\) (c) both of these (d) none of these

Which of the following is not a preliminary test used to detect ions (a) brown ring test (b) borax bead test (c) flame test (d) permanganate test

In borax bead test which compound is formed (a) ortho borate (b) meta borate (c) double oxide (d) tetra borate

\(\mathrm{Na}_{2} \mathrm{CO}_{3}\) cannot be used for identification of (a) \(\mathrm{S}^{2-}\) (b) \(\mathrm{SO}_{3}^{2-}\) (c) \(\mathrm{BO}_{3}^{3-}\) (d) \(\mathrm{CO}_{3}^{2-}\)

The \(\mathrm{Na}^{+}\)present in \(\mathrm{NaCl}\) is (a) acidic radical (b) basic radical (c) neutral radical (d) none of these

In India at the occasion of marriages, the fire works are used, which of the following gives green flame? (a) \(\mathrm{K}\) (b) \(\mathrm{Ba}\) (c) \(\mathrm{Be}\) (d) \(\mathrm{Na}\)

Ions of \(\mathrm{Ca}, \mathrm{Ba}\) and Sr precipitate in \(\mathrm{V}\) group as their (a) sulphides (b) sulphates (c) oxides (d) carbonates

Group reagent for the precipitation of group II basic radicals for the qualitative analysis is (a) \(\mathrm{NH}_{4} \mathrm{OH}+\mathrm{H}_{2} \mathrm{~S}\) (b) dil. \(\mathrm{HCl}+\mathrm{H}_{2} \mathrm{~S}\) (c) only \(\mathrm{H}_{2} \mathrm{~S}\) (d) none of these

A salt which on heating with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives violet vapours is (a) bromide (b) nitrate (c) iodide (d) sulphate

Perssian blue is formed when (a) ammonium sulphate reacts with \(\mathrm{FeCl}_{3}\) (b) ferrous sulphate reacts with \(\mathrm{FeCl}_{3}\) (c) ferrous ammonium sulphate reacts with \(\mathrm{FeCl}_{3}\) (d) ferric sulphate reacts with \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\)

Which of the following will not give positive chromyl chloride test? (a) zinc chloride (b) copper chloride, \(\mathrm{CuCl}_{2}\) (c) mercuric chloride, \(\mathrm{HgCl}_{2}\) (d) anilinium chloride \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{3} \mathrm{Cl}\)

Nitrates of all metals are (a) unstable (b) coloured (c) insoluble in water (d) soluble in water

The composition of golden spangles is (a) \(\mathrm{PbI}_{2}\) (b) \(\mathrm{BaCrO}_{4}\) (c) \(\mathrm{As}_{2} \mathrm{~S}_{3}\) (d) \(\mathrm{PbCrO}_{4}\)

The aqueous solution of the following salts will be coloured (a) \(\mathrm{LiNO}_{3}\) (b) \(\mathrm{CrCl}_{3}\) (c) \(\mathrm{Zn}\left(\mathrm{NO}_{3}\right)_{2}\) (d) potash alum

Which of the following reagents cannot be used to distinguish between phenol benzyl alcohol? (a) \(\mathrm{NaOH}\) (b) Bromine/CCl \(_{4}\) (c) \(\mathrm{NaHCO}_{3}\) (d) Both (b) and (c)